Merge branch 'master' into Huys_Branch
trying to overhaul from checkbox to expandable list for future use
countinuing to work on the overhaul
implemented expandable without checkboxs

Finished adding expandablelist so that we can have groups and contacts.
Still need to to add the buttons back and combining it with checkboxs
Merge branch 'master' into Huys_Branch

Conflicts:
	PayBack/res/layout/activity_transaction2.xml
	PayBack/res/layout/activity_transaction2_contactlist.xml
	PayBack/src/com/example/payback/Transaction2Activity_contactlist.java
	PayBack/src/com/example/payback/User.java
changed to 2.3.3
implemented list in the contact list

still have a bug with diolog boxes but otherwise is there now
updating master to huy's branch
Finished debugging list in contacts. fully implemented

dialog boxes are still broken
step 1 on combining expandable list and checkbox
about halfway through combining checkboxes and expandable list

still have checkbox cycle bug and still need to make it a list of friend
rather then strings to pass on the data properly
merging master into huybranch